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Loans Past Due Analysis (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	$ 393,979us-gaap_FinancingReceivableRecordedInvestmentCurrent	$ 399,637us-gaap_FinancingReceivableRecordedInvestmentCurrent
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	1,843aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue	2,855aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Financing Receivable, Recorded Investment, Total Still Accruing	395,824aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing	402,492aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing
Financing Receivable, Recorded Investment, Nonaccrual Status	1,251us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus	1,117us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Loans and Leases Receivable, Gross, Carrying Amount	397,075us-gaap_LoansAndLeasesReceivableGrossCarryingAmount	403,609us-gaap_LoansAndLeasesReceivableGrossCarryingAmount	377,827us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	52,401us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember	54,106us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	82aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember	168aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Financing Receivable, Recorded Investment, Total Still Accruing	52,485aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember	54,274aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Financing Receivable, Recorded Investment, Nonaccrual Status	51us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember	55us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Loans and Leases Receivable, Gross, Carrying Amount	52,536us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember	54,329us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember	54,632us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	36,988us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember	36,483us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	319aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember	210aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Recorded Investment, Total Still Accruing	37,307aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember	36,693aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Recorded Investment, Nonaccrual Status	618us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember	605us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Loans and Leases Receivable, Gross, Carrying Amount	37,925us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember	37,298us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember	31,275us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	42,951us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember	51,832us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember	201aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Financing Receivable, Recorded Investment, Total Still Accruing	42,951aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember	52,033aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Financing Receivable, Recorded Investment, Nonaccrual Status	405us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember	263us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Loans and Leases Receivable, Gross, Carrying Amount	43,356us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember	52,296us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	139,515us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember	139,710us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember	0aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Financing Receivable, Recorded Investment, Total Still Accruing	139,515aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember	139,710aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Financing Receivable, Recorded Investment, Nonaccrual Status	0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember	0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Loans and Leases Receivable, Gross, Carrying Amount	139,515us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember	139,710us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	182,466us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember	191,542us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember	201aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, Total Still Accruing	182,466aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember	191,743aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, Nonaccrual Status	405us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember	263us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Loans and Leases Receivable, Gross, Carrying Amount	182,871us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember	192,006us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember	178,721us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	64,952us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember	64,713us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	1,018aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember	1,736aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Financing Receivable, Recorded Investment, Total Still Accruing	65,970aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember	66,449aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Financing Receivable, Recorded Investment, Nonaccrual Status	27us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember	40us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Loans and Leases Receivable, Gross, Carrying Amount	65,997us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember	66,489us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	44,719us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember	40,503us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	399aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember	495aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Financing Receivable, Recorded Investment, Total Still Accruing	45,118aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember	40,998aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Financing Receivable, Recorded Investment, Nonaccrual Status	150us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember	154us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Loans and Leases Receivable, Gross, Carrying Amount	45,268us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember	41,152us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	109,671us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember	105,216us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	1,417aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember	2,231aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, Total Still Accruing	111,088aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember	107,447aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Financing Receivable, Recorded Investment, Nonaccrual Status	177us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember	194us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Loans and Leases Receivable, Gross, Carrying Amount	111,265us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember	107,641us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember	101,433us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	12,453us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember	12,290us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	25aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember	45aubn_FinancingReceivableRecordedInvestment30To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember
Financing Receivable, Recorded Investment, Total Still Accruing	12,478aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember	12,335aubn_FinancingReceivableRecordedInvestmentTotalStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember
Financing Receivable, Recorded Investment, Nonaccrual Status	0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember	0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember
Loans and Leases Receivable, Gross, Carrying Amount	$ 12,478us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember	$ 12,335us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember	$ 11,766us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember

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- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

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- Definition

No authoritative reference available.

+ References

No definition available.

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- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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